Altec Lansing's family of distinctively wedge-shaped speakers now has a new sibling: Octiv 650 ($XXX, aka MP650) is a bigger model with twin 3" drivers firing from the front, and a 4" down-firing subwoofer on the bottom, providing stronger bass power than before. A newly redesigned rear panel gains component video out capabilities, enabling Octiv 650 to serve as an iPod- and iPhone-docking audio companion to a television set, in addition to its primary…